Tooth whitening by a direct-current cold atmospheric-pressure air plasma micro jet assisted with a gel containing NO H2O2

Aesthetics of teeth, including tooth color, is of great importance to people. Conventional clinical tooth-whitening treatments are mainly based on hydrogen peroxide (H₂O₂), while some studies demonstrate that the bleaching process can be accelerated when enhanced by heat or light (laser, cold light). The dependence on H₂O₂ may lead to sensitivity or different degree of injury on soft tissue. As the forth material state, non-thermal plasmas have recently attracted much interest in biomedicine. Studies confirm that nonthermal plasma is effective in accelerating the tooth whitening process.